Loading...
Skip to main content
GeekWala

CVE-2026-61570 — MPXJ: XXE Vulnerability in MPXJ.Net — CVE Details

HIGH

MPXJ: XXE Vulnerability in MerlinReader

Published September 22, 2026Updated October 1, 2026Source: osv

Summary

### Impact MPXJ used the default configuration when creating a DocumentBuilder instance, which leaves doctype declarations enabled, when parsing the XML content of the ZTIMEINTERVALS column from a Merlin project SQLite file. This would allow a carefully crafted XML payload to read an arbitrary file. However, although an arbitrary file can be read, the way the resulting parsed XML is processed by MPXJ means that the data it contains is unlikely to be available for exfiltration. ### Patches The patch is included in MPXJ 16.4.1 ### Workarounds Potential workarounds include: * Avoid reading Merlin project files with MPXJ * Only accept Merlin project files from trusted sources * Preprocess Merlin SQLite databases to strip doctype declarations from the ZTIMEINTERVALS column

Advisory Timeline

  • First published September 22, 2026 (20 days ago).
  • Last revised October 1, 2026 — 9 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet
Update MPXJ.Net to 16.4.1 or later
dotnet add package MPXJ.Net --version 16.4.1
NuGet
Update net.sf.mpxj-for-vb to 16.4.1 or later
dotnet add package net.sf.mpxj-for-vb --version 16.4.1
NuGet
Update net.sf.mpxj to 16.4.1 or later
dotnet add package net.sf.mpxj --version 16.4.1
Bundler
Update mpxj to 16.4.1 or later
gem install mpxj -v 16.4.1
pip
Update mpxj to 16.4.1 or later
pip install "mpxj>=16.4.1"
NuGet
Update net.sf.mpxj-for-csharp to 16.4.1 or later
dotnet add package net.sf.mpxj-for-csharp --version 16.4.1
Maven
Update net.sf.mpxj:mpxj to 16.4.1 or later
<!-- Update pom.xml dependency version to 16.4.1 for net.sf.mpxj:mpxj -->

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (7)

Affects 4 ecosystems: nuget (4), maven (1), pypi (1), rubygems (1).

PackageEcosystemAffectedFixed In
MPXJ.Net
nuget
13.0.0, 13.0.1, 13.0.2, 13.1.0 (+39 more)16.4.1
net.sf.mpxj-for-vb
nuget
10.0.0, 10.0.1, 10.0.2, 10.0.3 (+181 more)16.4.1
net.sf.mpxj
nuget
10.0.0, 10.0.1, 10.0.2, 10.0.3 (+181 more)16.4.1
mpxj
rubygems
10.0.0, 10.0.1, 10.0.2, 10.0.3 (+205 more)16.4.1
mpxj
pypi
10.0.0, 10.0.1, 10.0.2, 10.0.3 (+122 more)16.4.1
net.sf.mpxj-for-csharp
nuget
10.0.0, 10.0.1, 10.0.2, 10.0.3 (+181 more)16.4.1
net.sf.mpxj:mpxj
maven
10.0.0, 10.0.1, 10.0.3, 10.0.4 (+202 more)16.4.1

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-611
    XML External Entity (XXE)MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Frequently Asked Questions

What is CVE-2026-61570?
MPXJ: XXE Vulnerability in MerlinReader This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2026-61570?
CVE-2026-61570 affects MPXJ.Net, net.sf.mpxj-for-vb and net.sf.mpxj (and 3 more). Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-61570 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-5vvx-3h34-f3gj
PYSEC-2026-4107

Related CVEs

More NuGet advisories

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies